E-book readers support users to create learning footprints in many forms, it also allows instructors to update their documents in the e-book reading system. However, e-book users often face problems when trying to find the learning footprints they made in a new version document. In this paper, we deal with how to determine similar pages for learning footprints transferring across versions within an e-book reader in a coursework scenario. We propose an algorithm include Diff method and Transfer method to transfer learning footprints across versions based on page image similarity comparison, and we also try to find an optimal threshold for similar pages determination. After that, we prepare some data for testing and then analyze how well can this algorithm address the problem and what is the optimal threshold for similar pages determination, and the analysis results will be presented.